What exactly is a "rear projection LCD?" [Archive] - Audio & Video Forums

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jollyrogerpirate
08-25-2005, 08:25 AM
I'm no expert on LCD and Rear Projection, but the two together seem to be contrary?

http://www.bestbuy.com/site/olspage.jsp?skuId=6784483&type=product&cmp=++&id=1089890510058

Sony model here with "rear projection LCD," could someone explain the technology?

Pyrrho
08-25-2005, 09:35 AM
Take a look at:

http://electronics.howstuffworks.com/projection-tv3.htm

The article begins at:

http://electronics.howstuffworks.com/projection-tv.htm

edtyct
08-25-2005, 09:43 AM
Jollyrogerpirate,

Or here's a quick study. To be simple, if not simplistic about it, an LCD RPTV is based on three tiny chips (for red, green, and blue), each holding the TVs complement of LCD crystals and transmitting light, ultimately combining to project a single image on the screen. CRT RPTVs have three tubes for each primary color instead of three microchips, and DLPs usually have a single chip composed of tiny mirrors that create an image from light in conjunction with a color wheel that is intended to spin quickly enough to fool the eye into seeing all colors in an image simultaneously when in fact they are rendered successively. LCoS and DiLA rear projectors are variations on the LCD theme but avoid any hint of projecting the spaces between pixels by positioning electronics behind the crystals instead of inertly beside them. They also do a better job of deflecting light from unwanted parts of the screen.

Ed